<!DOCTYPE html>

<html>

<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>I love you</title>
    <style type="text/css">
        body {
            margin: 0;
            overflow: hidden;
            background: #000;
        }

        canvas {
            position: absolute;
            width: 100%;
            height: 100%;
        }

        #pinkboard {
            animation: anim 1.5s ease-in-out infinite;
            -webkit-animation: anim 1.5s ease-in-out infinite;
            -o-animation: anim 1.5s ease-in-out infinite;
            -moz-animation: anim 1.5s ease-in-out infinite;
        }

        @keyframes anim {
            0% {
                transform: scale(0.8);
            }

            25% {
                transform: scale(0.7);
            }

            50% {
                transform: scale(1);
            }

            75% {
                transform: scale(0.7);
            }

            100% {
                transform: scale(0.8);
            }
        }

        @-webkit-keyframes anim {
            0% {
                -webkit-transform: scale(0.8);
            }

            25% {
                -webkit-transform: scale(0.7);
            }

            50% {
                -webkit-transform: scale(1);
            }

            75% {
                -webkit-transform: scale(0.7);
            }

            100% {
                -webkit-transform: scale(0.8);
            }
        }

        @-o-keyframes anim {
            0% {
                -o-transform: scale(0.8);
            }

            25% {
                -o-transform: scale(0.7);
            }

            50% {
                -o-transform: scale(1);
            }

            75% {
                -o-transform: scale(0.7);
            }

            100% {
                -o-transform: scale(0.8);
            }
        }

        @-moz-keyframes anim {
            0% {
                -moz-transform: scale(0.8);
            }

            25% {
                -moz-transform: scale(0.7);
            }

            50% {
                -moz-transform: scale(1);
            }

            75% {
                -moz-transform: scale(0.7);
            }

            100% {
                -moz-transform: scale(0.8);
            }
        }

        #name {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            margin-top: -20px;
            font-size: 46px;
            color: #ea80b0;
        }
    </style>
</head>

<body>
    <canvas id="pinkboard" width="1920" height="947"></canvas>

    <canvas id="canvas" width="1920" height="947"></canvas>

    <script type="text/javascript">
        const colors = [
            "#eec996",
            "#8fb7d3",
            "#b7d4c6",
            "#c3bedd",
            "#f1d5e4",
            "#cae1d3",
            "#f3c89d",
            "#d0b0c3",
            "#819d53",
            "#c99294",
            "#cec884",
            "#ff8e70",
            "#e0a111",
            "#fffdf6",
            "#cbd7ac",
            "#e8c6c0",
            "#dc9898",
            "#ecc8ba",
        ]; //用来设置的颜色
        var canvas = document.getElementById("canvas");
        var ctx = canvas.getContext("2d");
        let count = 1;

        var ww = window.innerWidth;
        var wh = window.innerHeight;

        var hearts = [];

        function init() {
            requestAnimationFrame(render);
            canvas.width = ww;
            canvas.height = wh;
            for (var i = 0; i < 100; i++) {
                hearts.push(new Heart());
            }
        }

        function Heart() {
            this.x = Math.random() * ww;
            this.y = Math.random() * wh;
            this.opacity = Math.random() * 0.5 + 0.5;
            this.vel = {
                x: (Math.random() - 0.5) * 4,
                y: (Math.random() - 0.5) * 4,
            };
            this.targetScale = Math.random() * 0.15 + 0.02;
            this.scale = this.targetScale * Math.random();
        }

        Heart.prototype.update = function (i) {
            this.x += this.vel.x;
            this.y += this.vel.y;

            this.scale += (this.targetScale - this.scale) * 0.01;
            if (this.x - this.width > ww || this.x + this.width < 0) {
                this.scale = 0;
                this.x = Math.random() * ww;
            }
            if (this.y - this.height > wh || this.y + this.height < 0) {
                this.scale = 0;
                this.y = Math.random() * wh;
            }
            this.width = 473.8;
            this.height = 408.6;
        };
        Heart.prototype.draw = function (i) {
            ctx.globalAlpha = this.opacity;
            ctx.font = `${180 * this.scale}px "微软雅黑"`;
            // ctx.font="20px";
            ctx.fillStyle = colors[i % 18];
            ctx.fillText(
                "花无缺，我喜欢你",
                this.x - this.width * 0.5,
                this.y - this.height * 0.5,
                this.width,
                this.height
            );

        };

        function render() {
            ctx.clearRect(0, 0, ww, wh);
            // ctx.globalAlpha = 1;
            // ctx.fillStyle = "rgba(255,255,255,0.3)";
            // ctx.fillRect(0, 0, ww, wh);
            for (var i = 0; i < 100; i++) {
                hearts[i].update(i);
                hearts[i].draw(i);
            }
            requestAnimationFrame(render);
        }
        init();

        window.addEventListener("resize", function () {
            ww = window.innerWidth;
            wh = window.innerHeight;
        });
    </script>
    <script>
        /*
         * Settings
         */
        var settings = {
            particles: {
                length: 500, // maximum amount of particles
                duration: 2, // particle duration in sec
                velocity: 100, // particle velocity in pixels/sec
                effect: -0.75, // play with this for a nice effect
                size: 30, // particle size in pixels
            },
        };

        /*
         * RequestAnimationFrame polyfill by Erik M?ller
         */
        (function () {
            var b = 0;
            var c = ["ms", "moz", "webkit", "o"];
            for (var a = 0; a < c.length && !window.requestAnimationFrame; ++a) {
                window.requestAnimationFrame = window[c[a] + "RequestAnimationFrame"];
                window.cancelAnimationFrame =
                    window[c[a] + "CancelAnimationFrame"] ||
                    window[c[a] + "CancelRequestAnimationFrame"];
            }
            if (!window.requestAnimationFrame) {
                window.requestAnimationFrame = function (h, e) {
                    var d = new Date().getTime();
                    var f = Math.max(0, 16 - (d - b));
                    var g = window.setTimeout(function () {
                        h(d + f);
                    }, f);
                    b = d + f;
                    return g;
                };
            }
            if (!window.cancelAnimationFrame) {
                window.cancelAnimationFrame = function (d) {
                    clearTimeout(d);
                };
            }
        })();

        /*
         * Point class
         */
        var Point = (function () {
            function Point(x, y) {
                this.x = typeof x !== "undefined" ? x : 0;
                this.y = typeof y !== "undefined" ? y : 0;
            }
            Point.prototype.clone = function () {
                return new Point(this.x, this.y);
            };
            Point.prototype.length = function (length) {
                if (typeof length == "undefined")
                    return Math.sqrt(this.x * this.x + this.y * this.y);
                this.normalize();
                this.x *= length;
                this.y *= length;
                return this;
            };
            Point.prototype.normalize = function () {
                var length = this.length();
                this.x /= length;
                this.y /= length;
                return this;
            };
            return Point;
        })();

        /*
         * Particle class
         */

        var Particle = (function () {
            function Particle() {
                this.position = new Point();
                this.velocity = new Point();
                this.acceleration = new Point();
                this.age = 0;
            }
            Particle.prototype.initialize = function (x, y, dx, dy) {
                this.position.x = x;
                this.position.y = y;
                this.velocity.x = dx;
                this.velocity.y = dy;
                this.acceleration.x = dx * settings.particles.effect;
                this.acceleration.y = dy * settings.particles.effect;
                this.age = 0;
            };
            Particle.prototype.update = function (deltaTime) {
                this.position.x += this.velocity.x * deltaTime;
                this.position.y += this.velocity.y * deltaTime;
                this.velocity.x += this.acceleration.x * deltaTime;
                this.velocity.y += this.acceleration.y * deltaTime;
                this.age += deltaTime;
            };
            Particle.prototype.draw = function (context, image) {
                function ease(t) {
                    return --t * t * t + 1;
                }
                var size = image.width * ease(this.age / settings.particles.duration);
                context.globalAlpha = 1 - this.age / settings.particles.duration;
                context.drawImage(
                    image,
                    this.position.x - size / 2,
                    this.position.y - size / 2,
                    size,
                    size
                );
            };
            return Particle;
        })();

        /*
         * ParticlePool class
         */
        var ParticlePool = (function () {
            var particles,
                firstActive = 0,
                firstFree = 0,
                duration = settings.particles.duration;

            function ParticlePool(length) {
                // create and populate particle pool
                particles = new Array(length);
                for (var i = 0; i < particles.length; i++)
                    particles[i] = new Particle();
            }
            ParticlePool.prototype.add = function (x, y, dx, dy) {
                particles[firstFree].initialize(x, y, dx, dy);

                // handle circular queue
                firstFree++;
                if (firstFree == particles.length) firstFree = 0;
                if (firstActive == firstFree) firstActive++;
                if (firstActive == particles.length) firstActive = 0;
            };
            ParticlePool.prototype.update = function (deltaTime) {
                var i;

                // update active particles
                if (firstActive < firstFree) {
                    for (i = firstActive; i < firstFree; i++)
                        particles[i].update(deltaTime);
                }
                if (firstFree < firstActive) {
                    for (i = firstActive; i < particles.length; i++)
                        particles[i].update(deltaTime);
                    for (i = 0; i < firstFree; i++) particles[i].update(deltaTime);
                }

                // remove inactive particles
                while (
                    particles[firstActive].age >= duration &&
                    firstActive != firstFree
                ) {
                    firstActive++;
                    if (firstActive == particles.length) firstActive = 0;
                }
            };
            ParticlePool.prototype.draw = function (context, image) {
                // draw active particles
                if (firstActive < firstFree) {
                    for (i = firstActive; i < firstFree; i++)
                        particles[i].draw(context, image);
                }
                if (firstFree < firstActive) {
                    for (i = firstActive; i < particles.length; i++)
                        particles[i].draw(context, image);
                    for (i = 0; i < firstFree; i++) particles[i].draw(context, image);
                }
            };
            return ParticlePool;
        })();

        /*
         * Putting it all together
         */
        (function (canvas) {
            var context = canvas.getContext("2d"),
                particles = new ParticlePool(settings.particles.length),
                particleRate =
                    settings.particles.length / settings.particles.duration, // particles/sec
                time;

            // get point on heart with -PI <= t <= PI
            function pointOnHeart(t) {
                return new Point(
                    160 * Math.pow(Math.sin(t), 3),
                    130 * Math.cos(t) -
                    50 * Math.cos(2 * t) -
                    20 * Math.cos(3 * t) -
                    10 * Math.cos(4 * t) +
                    25
                );
            }

            // creating the particle image using a dummy canvas
            var image = (function () {
                var canvas = document.createElement("canvas"),
                    context = canvas.getContext("2d");
                canvas.width = settings.particles.size;
                canvas.height = settings.particles.size;
                // helper function to create the path
                function to(t) {
                    var point = pointOnHeart(t);
                    point.x =
                        settings.particles.size / 2 +
                        (point.x * settings.particles.size) / 350;
                    point.y =
                        settings.particles.size / 2 -
                        (point.y * settings.particles.size) / 350;
                    return point;
                }
                // create the path
                context.beginPath();
                var t = -Math.PI;
                var point = to(t);
                context.moveTo(point.x, point.y);
                while (t < Math.PI) {
                    t += 0.01; // baby steps!
                    point = to(t);
                    context.lineTo(point.x, point.y);
                }
                context.closePath();
                // create the fill
                context.fillStyle = "#ea80b0";
                context.fill();
                // create the image
                var image = new Image();
                image.src = canvas.toDataURL();
                return image;
            })();

            // render that thing!
            function render() {
                // next animation frame
                requestAnimationFrame(render);

                // update time
                var newTime = new Date().getTime() / 1000,
                    deltaTime = newTime - (time || newTime);
                time = newTime;

                // clear canvas
                context.clearRect(0, 0, canvas.width, canvas.height);

                // create new particles
                var amount = particleRate * deltaTime;
                for (var i = 0; i < amount; i++) {
                    var pos = pointOnHeart(Math.PI - 2 * Math.PI * Math.random());
                    var dir = pos.clone().length(settings.particles.velocity);
                    particles.add(
                        canvas.width / 2 + pos.x,
                        canvas.height / 2 - pos.y,
                        dir.x,
                        -dir.y
                    );
                }

                // update and draw particles
                particles.update(deltaTime);
                particles.draw(context, image);
            }

            // handle (re-)sizing of the canvas
            function onResize() {
                canvas.width = canvas.clientWidth;
                canvas.height = canvas.clientHeight;
            }
            window.onresize = onResize;

            // delay rendering bootstrap
            setTimeout(function () {
                onResize();
                render();
            }, 10);
        })(document.getElementById("pinkboard"));

    </script>


</body>

</html>
